Lock.



PATENTED MAY 29, 1906.

R. L. MACDONALD- LOOK.

APPLICATION FILED AUG.27,1904.

W/TNESSES v bolt to maintain it in closed position.

UNITED smg si rnNT ()FFIGE- RALPH L. MAoDONALD, OF NIAGARA FALLS, NEW YORK.

LOCK.

Specification of Letters Patent.

Patented May '29, 1906.

Application filed August 27, 1904:. Serial No. 222,416.

To all whom, it Wmy concern.-

Be it known that I, RALPH L. MACDONALD, a citizen of the United States, residing at Niagara Falls, in the county of Niagara and State of New York, have invented certain new and useful Improvements in Locks and I do hereby declare the following to be a full, clear, and exact description of the invention,

such as will enable others skilled in the art to: which it appertains to make and use the part to be locked. A sliding bolt is inclosed in the shell also to engage with said stud or part to be locked, and a ivoted lever is also arranged within the shel to engage withAthe t a suitable point in the shell is arranged the hole for the key to engage with the lever and move it out of engagement with the bolt.

My invention is particularly adapted to be used with arc-lamp cables for securing them to the pole so that the lamp cannot be lowered until the cable is released, and when so used the lock is preferably provided with an insulating part by which it may be attached to the cable, but my lock may be slightly varied in form to adapt it'to a variety of uses, as shown in the drawings herewith, without departing from the spirit of my invention.

My invention will be understood by reference to the drawings herewith, in which the reference-numerals of the specification indicate the corresponding parts in all the figures.

Figure I is a plan with the top plate removed of a form of lock particularly adapted to be used with arc-lamps. Figs. II and III are respectively a similar plan and longitudinal section of a lock of slightly-varied form. Figs. IV and V are also, respectively, a similar plan and longitudinal section showing a form of look provided with double bolts.

In the figures is shown the inclosing shell, preferably composed of a continuous side plate 1, having an integral loop 2 a top plate 3, a bottom plate 4, and an end plate 5, which may be integral with the top plate. Within the shell is arranged the sliding locking-bolt 6, extending through opening in guide-plate 8 and having slot 7 in its end cooperating with the loop to engage with the stud or other part to be locked. This bolt is provided with a suitable surface 10, preferably inclined, with which engages a swinging lever 11, pivoted at 12 to maintain the bolt in looking position, and adjacent to the lever is the keyhole 14 in one of the plates for the key to engage with the lever and swing it out of g:

engagement with the bolt, whereby the latter is released and may be retracted. These are the essential elements of the new look I have. produced, which is simple, strong, durable,

made without hinged parts or parts which wear, become loose, &c., and protects the operative parts sufliciently from rain, frost,

snow, dust, 850., but yet is so simple in construction that even the entrance of such foreign substances does not particularly interfere with its operation. It is made without hinged parts, which are liable to rust, wear, and weaken, also without a multiplication of parts which are diflicult to assemble, liable to be lost or detached by vibration, shocks, &c.,

in use. Where the lock is subjected to a strain,

the strain or weight is sustained by the loop, an integral part of the shell, which may be made as strong as desirable, and not by a detachable or hinged part. A jar or blow does not tend to open the look.

In Fig. I, I have shown a form of lock particularly adapted for use with arc-light cables, in which the lever of bell-crank form is held in position by a spring 16 and the lock is permanently connected to cable 17 by means of a cross-bar or roller 18, of porcelain or other insulating material, secured between the extensions 19 19 01 the side plate.

In Figs. II and III is shown a form of lock secured in position by means of stud 22. After this is done the elongated end 23 of the bottom plate or rear faceplate is bent over and permanently secured in position by rivet 24, covering and protecting the stud and making it diflicult todetach the lock. Here the pivoted lever is arranged in a recess 26, formed in the bolt. One arm of the lever en gages with the surface 10 to retain the bolt in closed position, and the longer arm, provided with an integral roller 28, if desired, also engages with the bolt and operates positively to retract the bolt out of the engagement with the stud when the lever is turned by means of the key. Here a spiral spring 30 is intro duced to lock the bolt, provided with a guidestud 31.

In Figs. IV and V is shown a so-called double form of my lock, in which it is provided with two similar bolts, arranged one at each end, both maintained in position by the single lever, which is provided with a protruding stud 35 for the single key. Both bolts being released, either one or both may be retracted; This form is particularly adapted for heavy work and to connect together the ends of chains or to connect other parts where the lock engages with two studs. The side plates are thickened, the continuous loops reinforced and provided with lug 36 to engage with curved end 37 of bolts. Bolts may also be provided with ribs 38 to limit their movement.

ing shell composed of a continuous side piece, a bottom plate, a top plate and an end plate,

said side piece being extended beyond the shell to form an open loop, a sliding bolt in the shell adapted to move through an end opening in the shell within the loop toward and from said loop and a lever journaled in the shell to engage with the bolt, said shell being provided with a keyhole for an unlocking-key.

2. The combination in a lock of an elongated metallic inclosing shell composed of a continuous side plate, a top plate, a bottom plate and end plates, said side plate being extended beyond the shell to form an open loop at one end, the shell being provided at the opposite end with an extension by which the shell is secured in position, a sliding bolt, slotted at its outer end and arranged in the shell, and a lever journaled in the shell and adapted to engage with an inclined surface on the bolt.

3. In a lock, the combination with a metallic shell having the sides extended to form a loop at one end, a bolt in the shell adapted to slide to and from the loop, and a lever arranged inthe shell and adapted to engage the bolt.

4. In a lock, the combination with a metallic shell having the sides formed of a single piece extended at one end to form an open loop, of a bolt in the shell adapted to move into and out of engagement with the loop, and a lever j ournaled in the shell and adapted to engage with the bolt to maintain said bolt in locked position, the shell being provided with a keyhole for a key to engage with the lever.

5. In a lock, the combination with a flat elongated shell, of greater width than thickness, having an integral open loop on one end, a bolt arranged in the shell and adapted to slide freely therein to cooperate with the loop, a lever ournaled in the shell to engage with the bolt, and a spring to engage with the moving parts to retain the bolt in closed position in engagement with the loop, substantially as described and shown.

6. The combination in a lock for arc-lamp cables, with a metallic shell, having an open loop at one end of the shell and extensions at the opposite end, of an insulating-piece secured between the extensions for the attachment of the cable, a bolt in the shell adapted to slide out through an end opening into the loop and means to retain the bolt in closed position.

7. The combination in a lock for arc-lamp cables, of a metallic shell, having the sides of the shell formed of a single piece extended at one end into an open loop and at the other end into parallel extensions, with a porcelain roller journaled between said extensions for the attachment of the cable, a bolt arranged in the shell and adapted to slide toward and from the loop, and a lever journaled in the shell to engage with the bolt and maintain it in closed position, substantially as described.

8. In a lock, the combination with an elongated metallic inclosing shell, extended at one end to form an integral loop, of a bolt in the shell adapted to be moved toward and from the loop in the axis of the shell, a lever pivoted in the shell to swing into engagement with a portion of the bolt and hold it in closed position, and a spring engaging with one of the moving parts and tending to hold the bolt closed. 1

In testimony whereof I afiix my signature in presence of two witnesses.

RALPH L. MAODONALD.

Witnesses:

FR DERICK CHORMANN, MELVIN RIOKER. 

